Slide-valve gasolene-engine.



E. c'. rmx/msnml SLDE VALVE GASOLENE ENGINE.

. z 1m w a mi. 0 LN w 1w L am V. E mw m2 vvvv W DL 4U W Mv d n. A M m .7N o m 4 m H, M MIG d. 5 Y n0 n I w E. C. DAVDSUN. SLIDE VALVE GASOLENEENGINE.

APPLlcATloN FILED MAR.25,1914.

www?,

Patented Jan. 11, 1916.

2 SHEETS-SHEE 2.

kas

y arenaria.

fuori Lalli EDGRCfDAVIDSON, 03F OGENSBURG, NEW YORK.

l lSLIDEVALVE GASOLIENE-ENGNE Speccation of Letters Patent.

latented Jan. itt,

.Application filed March 25, 191,4.. SelalNo. 827,192.

citizen' ofthe United States, `residing at Qgdensburgfin the county otSt. Lawrence and'titate of New` York, have invented certain new anduseful improvements in Slide- Yalve Gasolene-iingines, of which thetollowing is a specification, reference being had therein to theaccompanying drawing.

This invention relates to slide-valve gasolene-engines and `has for itsprincipal ob )ect the production of a simple means for controlling theadmission of live gases into the explosive cylinder and also forcontrolling the discharge of the exhaust gases from the cylinder.

Another object ot this invention is the production ot' a simple andet'cient means for moving thevalves longitudinally of the cylinder so asto eliicientlv open and close the inlet and exhaust ports.

lWith these and other objects in view, this ivention consists of certainnovel constructions, combinations and arrangements of parts. as will behereinafter fully described and claimed.

In the drawings :Mltigure 1 is a central vertical section of the 'alveand operating mechanism applied to the cylinder of an engine. Fig. 2 isa side elevation of the upper portion of the engine. Fig. 3 lis a topplan view ot the engine. Fig. i is a section taken on line 1.4 of Fig.l., l cking in the direction of the arrow. Fijr fl is a detailperspective of the slide-valves. Fig. 6 is a sectional view showing` theslide-valves in an open po, sition. Fig. T is a side elevation of thecylinder-'head removed 'from the cylinder of the engine. Fig. 8 a,fragmentary sectional view taken through one of thesliding valvesshowing one of the parts formed therein.

By referring to the drawings, it will be seen that 1 designates thebaseof the engine, whichcarries the usual drive wheel 2. '1` he drive wheelQ is carried by a shaft 3. which shaftcarries a friction disk 4. Thefriction diskt engagesthe -friction disks 5,1which disks cooperate withthe operating rods il for rockin@ the rocker-arms 5, as will he morefully described. hereinafter.

cylinder casing 6.is mounted upon the base 1 and within the cylinder 6 apistonhead 7 is adapted to work, and is controlled by means ot thepiston-rod 8 which is connected to the drive wheel 2, as is common withsuch engines. 1t should be understood upon 'the cylinder-head 9 and thev.roc

that any suitable operating means may be employed for reciprocating thepiston 7 within the cylinder of the engine and operating` the rods i',without departing from the spirit of the invention.

A cylinder-head 9 is carried by the cylinder 6 and is provided with adownwardly extending sleeve 10, which sleeve is provided upon oppositesides thereof with circumterentially-extending slots 11, constitutingthe inlet and exhaust ports of the cylinder. rlhe cylinder-head-is alsoprovided with a cir cumferential flange-portion 12 which overhangs theupper end of the. cylinder, as is clearly illustrated in l? 1, for thepurpose of facilitating the attaching of the cvlinderhead 9 to the bodyot the cylinder 6. The cylinder 6 is provided with inlet and eX- haustnipples 13, to which-may be connected the ordinary exhaust convevinrrmechanism and also the carbureter, as is usual with such explosiveengines. The cylindenhead 9 is, of course, provided with the usualsocket lt for the pui-nose ot allowing a spark plug to be insertedtherethrough.

The cylinder 6 is provided with an offset portion 15 at its upper end,and the sleeveportion 10 of the cylinder-head 9 is spaced from the innerface of the olf-set portion 15 of the cylinder 6 so as to allow theslidevalve 16 to etliciently operate between the sleeve 10 and the innerwall of the off-set portion 15 of the cylinder 6.' Each of theslide-valves 16 comprises a substantially semi-circular band havingupwardlv-eXtending threaded pins 17 formed thereon. IThese pins 17extend up through the cylinder-head 9 and are connected to thetransversely-exn tending eyes 18 of the rocker-engaging pins 19. Aguiding sleeve 21 is formed around each of the pins 17 so as toconstitute a guide for the pins 17 when the slide-valves 16 arereciprocated upon the cylinder' 6. Each valve 16 is provided with aplurality ot ports which communicate with the upper edge of eachslide-valve 16 and also with the inner tace of the slide-valve forallowing air within the upper end of the cylinder to be forced downthrough the ports 22 and into the cylinder 6 or out through the exhaustport formed in said cylinder andthereby prevent the compression of airby the reciprocation of the slide-valves.

A plurality of brackets 23, are supported arms 5 are pivotally motn'itcdi released upon brackets 23, as is clearly illustrated in Figs. l, #iand G. rlhe rocker-arms 5 pivotally engage the riicker-linl s 2l` so asto allow the slide-valve 16 to eh'iciently operated without binding asthe operating-rods move relative to the cylinder 6.

F rom the foregoing description it will be seen that a. very eiiicientand simple means has been produced for reciprocating the slide-valve 1G,relative to the cylinder (l and thereby open and close the inlet andoutlet i and QG, respectively. lt should be further understood that theexhaust valve 1G -will also have a very light load or strain when.starting to open, the same will have ythe terminal pressure :trom theexplosion pressure will be immediately opening the valve.

That I claim is l. A. device of the class described, comprising acylinder, said cylinder provided with inlet and exhaust ports,slide-valves adapted to open and close said ports, means forreciprocating said valves within said stroke, which cylinder, ana3 'aidslide-valves provil iwith vertically-e:\;tendmg ports having l.. rally-'extending discharge ports comimnicatiag therewith 'for preventingcompression upon the top of said slide-valve as the sameare actuated.

2. In a device of the class described, the combination of a cylinder,said cylinder provided with inlet and exhaust ports, a cylinder headcarried by said cylinder,"said cylinder provided with an o-set port-ionat its upper portion, said head provided with a depending sleeve, saidsleeve and off-set portion extending in parallel spaced relation, slidevalves adapted to open and close vsaid ports, means Afor reciprocatingsaid val-ves within the space between said sleeve and off.-

mense? set portion, and said slide-valves provided withvertically-extending ports having laterally-extending discharge portscommunieating therewith, whereby air within the space between saidsleeve and said offset portion will. be forced through the ports formedin said slide-valves as said valves are actuated, whereby aircompression upon the top of said slide-valves is prevented.

3. In a device of the class described, the' combination of a cylinder,said cylinder provided with inlet and exhaust ports, slidevalves fittingupon said cylinder and comforming in shape thereto for opening andclosing said ports, means for reciprocating said valves, and saidslide-valves provided with vertically-extending ports havinglatcrally-extending discharge ports communieating therewith forpreventing compression upon thestop of said slide-valves as the same areactuated.

el. In a device oit' the class described, the combination of a cylinder,said cylinder provided with in let and exhaust ports.l said cylinderhaving guide-portions, slide-valves slidably mounted within said guideportions for opening and closingsaid ports, said guide portions beingadapted to retain said slide-valves in operative positions, i'neans forreciprocating said slide-valves, and ser.; slide-valves provided withvertically extending ports having laterally-extendin,il discharge portscommunicating there-with for preventing compression upon the top 0i2said slide-valves as the same are actuated,

In testimony whereof hereunto affix my signature in presence of twowitnesses. EDGAR C. EAVDSON. Vitnesses:

L. K. MARTIN, JNO. F. WELLS.

